Capital One Credit Card Complaint

Capital One Credit card department,

Credit line increase/decrease Arizona

I have been having negative financial issues with my bank ( Capital One ) concerning my line of credit on a credit card I have with them. This began in 2011, just after my husband passed away. I had credit - cards with Capital One at that time. I had a credit line of over $10000.00 on the first card. No sooner had my husband died, the credit limit on that card was brought down to $500.00. I also noticed Capital One was using my $85000.00 mortgage on my house toward - credit, which I understand is not supposed to be used for these purposes. I closed that first card. Two weeks ago I applied for a greater line of credit on the second card, which has a limit of $5000.00. I was denied the increase because " Recent use of this account 's existing credit line has been too low. '' However, I have charged up to $800.00 on


did not tell me what a suitable charge amount is. I feel Capital One has been discriminating against me and its practices have been deceptive, especially since this all occurred after the death of my husband ( six months later ) whose finances were separate from mine. I have always had pristine credit. It appears also that my credit from other banks have not been harmed because of this issue with Capital One. I would like to know what options I have. Are they allowed to use my mortgage amount to determine the line of credit for a credit card?